What does slt copine mean in English?

"SLT copine" doesn't translate directly to English. It's likely a French phrase, and the meaning depends on context:

* SLT could stand for "Salut" (French for "Hello"). In this case, "SLT copine" would be a informal greeting, meaning something like "Hello, girlfriend".

* "Copine" is the French word for "girlfriend" or "female friend".

Therefore, depending on the context, "SLT copine" could be a friendly greeting to a female friend, or a way to address your girlfriend.

Example:

* "SLT copine, ça va ?" (Hello, girlfriend, how are you?)

It's important to note that "copine" can be considered informal, so it's best to use it with people you know well.